I'm always trying new products when detailing my Audi's.  I have used at least 6 or 7 of the more popular waxes mentioned on the Audiworld forum but I like P21S wax the best.  It goes on very easily and the trick is not to let it dry.  Apply to a small area and immediately wipe off. I use microfiber towels.  The best shine I have seen.  The wax test site also found P21S to have a wonderful shine.  The P21S white cream cleaner is also tops.  I have found it very cost effective to buy the package deal, wax, cleaner, car wash soap and wheel cleaner in the combo pack.   I save about $ 30.00 doing this.  One jar has given me about 6 treatments with about 2 more in the jar. Remember to use just a little and to apply often.  I wax about once a month it is easy (takes about 45 minutes) and the shine is out of this world.